API Documentation Basics (OpenAPI / Swagger Concept)

When APIs are undocumented, teams waste time guessing. OpenAPI (Swagger) helps by describing: - endpoints - request bodies - response shapes - authentication methods ## Why it’s valuable - frontend devs can integrate faster - QA knows expected responses - fewer misunderstandings ## Practical tip Even if you do not implement Swagger UI yet, define a consistent JSON contract and document it in README. > Next: Deploy PHP professionally (Nginx/Apache, env vars, caching, and zero-downtime habits).